RNF14FTC324R Equivalent & Substitute Parts

Part Overview

The RNF14FTC324R is a 324 Ohm ±1% metal film axial through-hole resistor rated at 0.25W (1/4W) manufactured by Stackpole Electronics Inc. This component features flame retardant coating and safety construction, designed for applications requiring precision resistance values with reliable performance across industrial temperature ranges. The part maintains Active product status with 942 units in current inventory stock.

Substitute parts are identified to provide design flexibility when the primary part is unavailable, when alternative packaging formats are preferred, or when enhanced performance characteristics are beneficial for specific application requirements.

Substiute Parts

RNF14FTC324R

Stackpole Electronics IncIn Stock: 1042RNF14FTC324R Datasheet

Current PartRFQ

CMF55324R00FHEB

Vishay DaleIn Stock: 1458CMF55324R00FHEB Datasheet

UpgradeRFQ

CMF50324R00FHEB

Vishay DaleIn Stock: 1151CMF50324R00FHEB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RNF14FTC324R are qualified based on the following electrical and mechanical parameters:

Core Substitution Criteria:

• Resistance value: 324 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Composition: Metal Film (exact match required)
• Temperature Coefficient: ±50ppm/°C (exact match required)
• Package Type: Axial (exact match required)
• Number of Terminations: 2 (exact match required)

Allowable Variations:

• Power rating: Equal or greater than 0.25W
• Operating temperature range: Equal or greater than -55°C to 155°C
• Packaging format: Tape & Reel (TR) or Cut Tape (CT)
• Manufacturer: Different manufacturer acceptable if all electrical parameters match
• Additional features: Enhanced moisture resistance permitted

The identified substitutes CMF55324R00FHEB and CMF50324R00FHEB from Vishay Dale meet all core substitution criteria while offering enhanced operating temperature ranges and moisture-resistant construction.

Parameter Comparison

Engineering Selection Recommendations

CMF50324R00FHEB (MFR Recommended): This part provides direct electrical and mechanical equivalence to the RNF14FTC324R with identical power rating (0.25W) and package dimensions optimized for compact layouts. The part is ROHS3 compliant and maintains the same operating temperature floor of -55°C with an extended upper limit to 175°C. Moisture-resistant construction enhances reliability in humid environments. Note that this part carries REACH Affected status, requiring compliance verification for applications subject to REACH regulations.

CMF55324R00FHEB (Upgrade): This part offers enhanced power dissipation capability at 0.5W (1/2W), providing thermal margin for applications with higher current demands or thermal stress. The extended operating temperature range to 175°C and moisture-resistant features support demanding industrial environments. REACH Unaffected status simplifies regulatory compliance. Physical dimensions are slightly larger (0.090" diameter vs. 0.065" for CMF50), requiring board layout verification.

Both substitute parts maintain Active product status with adequate inventory availability and full compliance with ROHS3 requirements.

Frequently Asked Questions (FAQ)

Q: Can CMF55324R00FHEB be used as a direct replacement for RNF14FTC324R?

A: CMF55324R00FHEB meets all electrical substitution criteria (324 Ohms, ±1%, metal film, ±50ppm/°C, axial package). The primary difference is increased power rating (0.5W vs. 0.25W) and larger physical dimensions (0.090" diameter vs. 0.093"). Board layout must accommodate the slightly different size. The enhanced power rating does not create compatibility issues in circuits designed for 0.25W operation.

Q: What is the difference between CMF50324R00FHEB and CMF55324R00FHEB?

A: Both parts share identical electrical specifications (324 Ohms, ±1%, ±50ppm/°C). CMF50324R00FHEB matches the original 0.25W power rating with compact dimensions (0.065" diameter x 0.150" length). CMF55324R00FHEB provides higher power dissipation at 0.5W with larger dimensions (0.090" diameter x 0.240" length). Selection depends on available board space and thermal requirements.

Q: Are there packaging format differences between the main part and substitutes?

A: The RNF14FTC324R is supplied in Tape & Reel (TR) format. Both substitute parts are supplied in Cut Tape (CT) format. This difference affects handling and assembly processes but does not impact electrical or mechanical compatibility.

Q: What is the significance of REACH Affected vs. REACH Unaffected status?

A: CMF50324R00FHEB carries REACH Affected status, requiring compliance verification for applications subject to REACH regulations. CMF55324R00FHEB and RNF14FTC324R are REACH Unaffected. Selection should account for regulatory requirements in target markets and applications.

Q: Do the substitute parts maintain the same temperature coefficient?

A: Yes. All three parts (RNF14FTC324R, CMF50324R00FHEB, and CMF55324R00FHEB) maintain identical temperature coefficient of ±50ppm/°C, ensuring consistent performance stability across temperature variations.